Valve-packing.



, tially. of

No Drawing.

To all whom it may concern:

Be it known that we, CHARLES F. WALLACE and MARTIN F. "TiERNANfcitizensof the United States, residing at Tompkinsville, borough of Richmond,city and State of N ew York, and Jamaica, county of Queens, State of NewYork, respectively, have invented certain new and useful Improvements inValve-Packin of which the following is a full, clear, and exactdescription.

In certain kinds of apparatus, such as is used in treating fluids by oranalogous purposes, the problem ing for certain parts such as valvesnotably chlorin, of pack sisting the destructive efi'ects thereon of thechlorin, and at t e same time possess all the other properties which arerequiredof it under such circumstances and conditions of use. Thisexample will serve as typical of the required nature and purpose of thenew packing material which constitutes the subject of this application.

his improved packing is composed essenasbestos, bees-wax and graphiteand to produce it we follow the following process:

We first dissolve a quantity of bees-wax in a suitable menstruum such ascarbon tetra ehlorid and immerse in the solution asbestosstrings orropes until the latter are fully saturated. We then incorporate with theasbestos as thoroughly as possible graphite flakes or powder, byagitating the rope therein, by rubbing or otherwise. When this has beendone, the ropes are generally hung up andexposed to the air until thevolatile solvent has evaporated which leaves the asbestos coated withwax to which the graphite adheres.

his material is then wound about the stem of a valve or used in any waythat ordinary packing material is employed, and

Specification of Letters Patent.

Patented Nov 11ml.

Application filed August as, 191a. serial no. aerate.

is most efl'ective and desirable. constituent parts is liable to chlorinor other like agents, sesses highly lubricating and ties desirable insuch materials.

e believe the ingredients named above are the best and perhaps the onlyones suitable for the but this is largely a For example, instead ofbees-wax, other substances that resist the action of chlorin and becaused to impregnate, when dissolved by a volatile solvent, anon-destructible fiber such as e graphite rubbed in.

he process of making a packing ma terial herein described solvingbees-wax with a volatile solvent, impre nating asbestos rope with thesolution, rub ing finely divided graphite into the rope and thenallowing the solvent to evaporate ofi'.

In testimony our signatures.

CHARLES l5. WALLACE. -lR"lll[N F. 'llllElRhlAN.

whereof we hereunto atlix er with a substance of which consists in dis-

